Global Patent Index - EP 0904867 A3

EP 0904867 A3 20000802 - Method and system for determining heating point and heating line in bending of steel plate

Title (en)

Method and system for determining heating point and heating line in bending of steel plate

Title (de)

Verfahren und System zur Bestimmung des Heizpunktes und Heitzlinien im Biegeprozess einer Platte

Title (fr)

Procédé et système pour déterminer le point de chauffage et la ligne de chauffage dans un procédé de pliage d'une tôle

Publication

EP 0904867 A3 20000802 (EN)

Application

EP 98118299 A 19980928

Priority

  • JP 26374897 A 19970929
  • JP 26375197 A 19970929
  • JP 26108898 A 19980916
  • JP 26108998 A 19980916

Abstract (en)

[origin: EP0904867A2] A method and a system for determining a heating point and a heating line in steel plate bending place a virtual wooden pattern on a virtual steel plate; roll the wooden pattern or steel plate along a frame line from a reference position to contact the wooden pattern and steel plate at two points A, B on the steel plate and C, D on the wooden pattern; roll the wooden pattern or steel plate in the reverse direction for return to the reference position; obtain straight lines U, V connecting the contact points A, B and C, D, respectively; determine a heating point relative to a reference point based on an intersection point of the straight lines U, V; repeat the same steps while contacting the contact points A, C on a reference point side to use their contact point as a new reference point, to determine respective heating points along a specific line up to the end of the steel plate; draw straight lines from a certain heating point on a certain line to heating points on other lines based on the determined heating points; examine the degree of parallelism between each straight line and a roller line; if the degree is within a predetermined range, group the relevant heating points as the same group; and connect the heating points of the same group by a straight line or a curve to determine a heating line. <IMAGE>

IPC 1-7

B21D 11/20; B21D 5/00

IPC 8 full level

B21D 11/20 (2006.01)

CPC (source: EP KR US)

B21D 11/20 (2013.01 - EP KR US); B21D 11/22 (2013.01 - KR)

Citation (search report)

  • [A] WO 9421402 A1 19940929 - INST PODSTAWOWYCH PROBLEMOW TE [PL], et al
  • [A] WO 9502475 A1 19950126 - INST PODSTAWOWYCH PROBLEMOW TE [PL]
  • [A] EP 0575646 A1 19931229 - ALITECO AG [CH]
  • [A] US 4120187 A 19781017 - MULLEN ROGER F
  • [A] PATENT ABSTRACTS OF JAPAN vol. 1995, no. 06 31 July 1995 (1995-07-31)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 1995, no. 06 31 July 1995 (1995-07-31)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 1995, no. 04 31 May 1995 (1995-05-31)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 018, no. 190 (M - 1586) 31 March 1994 (1994-03-31)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 018, no. 598 (M - 1704) 15 November 1994 (1994-11-15)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0904867 A2 19990331; EP 0904867 A3 20000802; EP 0904867 B1 20020410; DE 69804735 D1 20020516; DE 69804735 T2 20021002; DK 0904867 T3 20020701; KR 100288414 B1 20010502; KR 19990030211 A 19990426; NO 312276 B1 20020422; NO 984529 D0 19980928; NO 984529 L 19990330; US 2002032542 A1 20020314; US 2002107656 A1 20020808; US 6298310 B1 20011002; US 6385556 B1 20020507; US 6456957 B1 20020924

DOCDB simple family (application)

EP 98118299 A 19980928; DE 69804735 T 19980928; DK 98118299 T 19980928; KR 19980040341 A 19980928; NO 984529 A 19980928; US 15975898 A 19980924; US 6125002 A 20020204; US 83460401 A 20010416